Find velocity at a specific time?

In summary, the individual is seeking help with a physics problem and is currently studying for a test. They are specifically asking for assistance with part c of the problem, which involves determining the time it takes for a mailbag to reach the ground after being released. They also provide a link to the question and ask for clarification on the movement of the mailbag, its starting height, and its initial velocity.
  • #1
treyh
3
1
Hey guys. I need help figuring out how to do this problem. I have a test tomorrow and i am currently studying. I would like to know how they got this answer. I'm completely stumped and need help so thanks in advance!

Here is the question:

http://img405.imageshack.us/img405/624/physicsv.jpg

Also, if not too much trouble can you help me with part c to this problem?:

(c) How long after it's release does the mailbag reach the ground?
 
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  • #2
treyh said:
Also, if not too much trouble can you help me with part c to this problem?:

(c) How long after it's release does the mailbag reach the ground?

What do you think, how does the mailbag move? At what hight does it start? What is its initial velocity?

ehild
 

FAQ: Find velocity at a specific time?

What is velocity?

Velocity is a measure of an object's speed and direction of motion. It is a vector quantity, meaning it has both a magnitude (numerical value) and a direction.

How is velocity calculated?

Velocity is calculated by dividing the change in an object's position (displacement) by the change in time. The formula for velocity is v = ∆x/∆t, where v is velocity, ∆x is displacement, and ∆t is change in time.

Can velocity be negative?

Yes, velocity can be negative. A negative velocity value indicates that an object is moving in the opposite direction of a chosen reference point or has a negative change in position over time.

What is the difference between velocity and speed?

The main difference between velocity and speed is that velocity includes direction, while speed does not. Speed is a scalar quantity, meaning it only has a magnitude, while velocity is a vector quantity with both magnitude and direction.

How can I find the velocity at a specific time?

To find the velocity at a specific time, you can use the formula v = ∆x/∆t and plug in the values for displacement and change in time at that specific time. Alternatively, you can graph the position versus time data and find the slope of the line at the desired time, which represents the velocity at that time.

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